Just got the frame back on my 65 Bonneville after powder coating and need to re-cut some of the threads. Can anyone tell me what the thread sizes are for the holes indicated please. thanks.:grin2:
1 You do not cut new threads. You need a rethreading tap
2 If the holes that are goobered up are for the oil tank mounting bracket and rear fender bracket all three points use the same bolt (82-0929). That bolt is a 5/16" X26 CEI thread 1/2" long
+1. The existing threads are still there, just full of baked-on powder-coating.
Equip yourself with either a full set of three taps or definitely #2 and #3 and, if you can afford it, a ratchet tap wrench.
Start by turning the the #2 tap in the hole with either your fingers or the tap wrench without any force; the taper of the tap will pick up the harder existing thread in the softer powder-coating and start to clear out the latter. When the #2's gone as far as it can, use the #3 to finish the job. Test with a bolt. :thumb
Thanks all for the help - i took Stuart's advice and recut them with some new shiny taps. Not sure how much use they will get but only a few quid each so not too bad. Had bookmarked the link as suggested and expect to use it often - great tip.
He hit the "." instead of the "/" looks like. I just mounted my tank and the bolt was around a 1/2" or so. Didn't measure it since it was the bolt I unscrewed when removing it.
My threads may be different from the OP's but I doubt the changed the depth of the hole.
OK, just found some more that need re-threading/cleaning but can't find them in the parts book . They are threaded holes to receive bolts that secure the hangar plates for the rear footrests - see pic. (No21 in the parts book is a CEI 5/16 but also shows a nut and washer but my frame is threaded?) Any thoughts or help gratefully received. thanks
Thanks all. Not sure what PO was trying to achieve but may just be impressions as Stuart suggests although its on all four holes and appears to to look someone intended them to be threaded. In any event I have left them alone as the holes are a comfortable fit for a bolt through both the frame and the hangar plates. Thanks for the help and advice.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Triumph Rat Motorcycle Forums
3.9M posts
167.7K members
Since 2002
A forum community dedicated to Triumph Motorcycle owners and enthusiasts. Come join the discussion about performance, racing, cafe racers, bobbers, riding, modifications, troubleshooting, maintenance, and more!